Mixing machine for powder coating production

Abstract

This application relates to a mixer for powder coating manufacturing, belonging to the technical field of powder coating manufacturing equipment. To solve the problem of imperfect sealing performance in mixers, it includes a mixing cylinder, a feed hopper at the top of the mixing cylinder, an openable and closable top cover at the top of the feed hopper, a vertically arranged feed pipe at the bottom of the feed hopper, and an inclined extrusion pipe connecting the feed pipe and the mixing cylinder. A pretreatment mechanism is installed inside the extrusion pipe. A sealing top plate is provided at the top of the mixing cylinder. The stirring mechanism includes a stirring main shaft, a drive motor, and a stirring paddle assembly. The stirring main shaft is rotatably connected inside the mixing cylinder, the drive motor is arranged on the sealing top plate, and the output end of the drive motor is connected to the end of the stirring main shaft. The stirring paddle assembly is arranged axially along the stirring main shaft, and a discharge port is provided at the bottom of the mixing cylinder. This application ensures zero leakage during the mixing process.

Description

Technical Field

[0001] This application relates to the field of powder coating manufacturing equipment technology, and in particular to a mixer for powder coating manufacturing. Background Technology

[0002] With increasing global emphasis on environmental protection and sustainable development, low-carbon and environmentally friendly powder coatings, as a green and efficient coating product, are gradually becoming the mainstream development direction of the coating industry. Compared with traditional solvent-based coatings, low-carbon and environmentally friendly powder coatings have many advantages, such as no solvent evaporation, zero VOC (volatile organic compound) emissions, high coating efficiency, and excellent coating performance. They not only effectively reduce environmental pollution but also lower energy consumption and safety risks during the coating process, and are widely used in home appliances, automobiles, construction, furniture, and many other fields. In the manufacturing process of low-carbon and environmentally friendly powder coatings, the mixing process is a crucial step. It involves uniformly mixing various raw materials such as resins, pigments, fillers, and additives according to a specific formula ratio, directly affecting the quality and performance of the powder coating.

[0003] Currently, traditional powder coating mixers on the market generate significant dust pollution during operation due to unreasonable mixing structure design. The mixers also have imperfect sealing performance, causing powder coating raw materials to leak into the surrounding environment during mixing. This not only wastes raw materials but also harms the health of operators, and therefore needs to be improved. Utility Model Content

[0004] To address the issue of imperfect sealing performance in mixers, this application provides a mixer for powder coating manufacturing.

[0005] The mixing machine for powder coating manufacturing provided in this application adopts the following technical solution:

[0006] A mixer for powder coating manufacturing includes a mixing cylinder, a feed hopper at the top of the mixing cylinder, an openable and closable top cover at the top of the feed hopper, a feed pipe vertically arranged at the bottom of the feed hopper, an inclined extrusion pipe communicating between the feed pipe and the mixing cylinder, a pretreatment mechanism inside the extrusion pipe, a stirring mechanism inside the mixing cylinder, a sealing top plate at the top of the mixing cylinder, the stirring mechanism including a stirring spindle, a drive motor, and a stirring paddle assembly, the stirring spindle being rotatably connected inside the mixing cylinder, the drive motor being arranged on the sealing top plate, the output end of the drive motor being connected to the end of the stirring spindle, the stirring paddle assembly being arranged axially along the stirring spindle, and a discharge port at the bottom of the mixing cylinder.

[0007] Due to an unreasonable design of the mixing structure, significant dust pollution is generated during operation. The imperfect sealing performance of the mixer causes powder coating raw materials to leak into the surrounding environment during mixing, resulting in not only waste of raw materials but also harm to the health of operators. By adopting the above-mentioned technical solution, including a mixing cylinder, a feeding hopper located above the mixing cylinder, a top cover that can be opened and closed on the top of the feeding hopper, a feeding pipe connected to the top of the feeding hopper, an extrusion pipe connected between the feeding pipe and the mixing cylinder, a pretreatment mechanism located inside the extrusion pipe, a stirring mechanism located inside the mixing cylinder, a sealing top plate installed on the top of the mixing cylinder, and the stirring mechanism including a stirring main shaft, a drive motor, and a stirring paddle assembly;

[0008] When powder coatings undergo a mixing process, various powder coating raw materials, such as resin powder, pigment powder, filler powder, and various additives, are prepared according to a pre-set formula ratio. Then, the openable and closable top cover of the feed hopper is opened, and the prepared raw materials are poured into the feed hopper in sequence. After the feeding operation is completed, the cover is closed in time to provide a preliminary sealing effect and prevent dust from being generated by the raw materials. After the raw materials enter the feed hopper, they flow down along the vertical feed pipe at the bottom of the feed hopper and enter the extrusion pipe. The pretreatment mechanism set in the extrusion pipe begins to function, promoting the initial contact and mixing between different raw materials. After pretreatment, the raw materials enter the mixing cylinder from the extrusion pipe. The drive motor starts to work, driving the stirring main shaft to rotate. The stirring paddle assembly on it moves accordingly, so that the raw materials in the mixing cylinder can be fully stirred and mixed in all directions. During the mixing process, the sealing top plate at the top of the mixing cylinder plays a key sealing role, ensuring that a relatively independent and sealed space is formed inside the mixing cylinder. After a period of thorough mixing, the powder coating raw materials meet the requirements of uniform mixing. At this time, the discharge port set at the bottom of the mixing cylinder is opened to discharge smoothly into the subsequent production process.

[0009] By incorporating a mixing cylinder, feed pipe, stirring mechanism, and sealing top plate, this powder coating manufacturing mixer effectively solves the problems of leakage and dust pollution associated with traditional equipment through optimized structural design. The feed hopper is equipped with an openable and closable top cover, which can be closed after feeding to initially prevent dust overflow. The sealing top plate above the mixing cylinder fits tightly with the cylinder body to form a fully enclosed cavity, ensuring zero leakage during the mixing process. Overall, the equipment achieves initial fusion of raw materials through a pretreatment mechanism inside the extrusion pipe, and efficiently mixes them with the multi-directional paddle assembly of the stirring mechanism. Uniform mixing is completed in a closed environment, avoiding raw material waste and environmental pollution, protecting the health of operators, and significantly improving the production quality and environmental benefits of powder coatings.

[0010] Optionally, an annular sealing ring is provided between the sealing top plate and the top of the mixing cylinder, and the annular sealing ring fills the mating surface between the sealing top plate and the mixing cylinder.

[0011] By adopting the above technical solution, the annular sealing ring is filled on the mating surface between the sealing top plate and the mixing cylinder. The setting of the annular sealing ring effectively isolates the internal and external environments of the mixing cylinder, ensuring that the mixing process is carried out in a completely sealed space. This avoids the leakage of powder coating raw materials into the surrounding environment due to poor sealing, not only eliminating the waste of raw materials, but also greatly reducing the harm of dust pollution to the health of operators and ensuring the stability of the mixing environment.

[0012] Optionally, the sealed top plate is also provided with an observation window for observing the internal situation.

[0013] By adopting the above technical solution, the observation window is formed on the sealed top plate. With the setting of the observation window, the operator can intuitively see the mixing state of the raw materials in the mixing drum without opening the cover, such as whether the raw materials are fully dispersed or whether there are any abnormalities such as agglomeration, so as to adjust the stirring parameters or take other measures in time to ensure that the mixing process is efficient and meets the quality standards.

[0014] Optionally, a three-dimensional frame for support is provided on the outer wall of the feed hopper, a triangular truss is provided inside the three-dimensional frame, and an mounting plate for connecting with the triangular truss is provided on the feed pipe.

[0015] By adopting the above technical solution, the three-dimensional frame is welded and fixed to the outer wall of the feed hopper, the triangular truss is welded and fixed inside the three-dimensional frame, and the feed pipe is fixed to the triangular truss by the mounting plate. Through the setting of the three-dimensional frame, the triangular truss and the mounting plate, the three-dimensional frame provides basic support for the entire feeding structure, and the triangular truss enhances the stability and strength of the support structure, which can effectively bear the weight of the raw materials in the feed hopper and feed pipe and the vibration during equipment operation, ensuring the smoothness and stability of the feeding process.

[0016] Optionally, rappers are symmetrically arranged on the outer wall of the feed pipe, and the excitation direction of the rappers is perpendicular to the pipe wall plane.

[0017] By adopting the above technical solution, the vibrators are symmetrically installed on the outer wall of the feed pipe. The vibrators can generate a vibration force perpendicular to the pipe wall plane. Through periodic vibration, the adhesion of the raw material on the pipe wall is effectively broken, which promotes the smooth sliding of the raw material, prevents blockage, and ensures that the feeding process remains efficient and stable.

[0018] Optionally, a clamp connector is provided between the feed pipe and the extrusion pipe, and the clamp connector is arranged at the connection between the feed pipe and the extrusion pipe.

[0019] By adopting the above technical solution, the clamp connector is installed at the connection between the feed pipe and the extrusion pipe; the clamp connector can tightly clamp the feed pipe and the extrusion pipe to form a reliable sealed connection, effectively preventing raw material leakage at the connection and avoiding raw material waste and environmental pollution.

[0020] Optionally, the axis of the extrusion tube forms an angle of 10°-30° with the horizontal plane, and the feeding direction of the extrusion tube is inclined toward the mixing cylinder.

[0021] By adopting the above technical solution, the axis of the extrusion tube is at an angle of 10°-30° to the horizontal plane; by arranging the extrusion tube at an angle, the inclined extrusion tube uses the weight of the raw material itself and the slope of the pipe to guide the raw material more smoothly from the feed pipe into the mixing cylinder, reducing the residue and accumulation of raw material in the pipe and reducing the risk of blockage.

[0022] Optionally, the pretreatment mechanism includes an extrusion screw and an extrusion motor. The extrusion screw is rotatably arranged inside the extrusion tube and is arranged along the length of the extrusion tube. The extrusion motor is arranged outside the extrusion tube, and the output end of the extrusion motor is connected to the end of the extrusion screw.

[0023] By adopting the above technical solution, the pretreatment mechanism includes an extrusion screw and an extrusion motor. When the raw materials that need pretreatment are used, the extrusion motor starts working, driving the extrusion screw to rotate, promoting the initial contact and mixing between different raw materials. Through the setting of the pretreatment mechanism, the raw materials are pushed towards the mixing drum, where they are sheared and kneaded, promoting the initial contact, dispersion and mixing between different raw materials, breaking the agglomeration between raw material particles, making the particle size distribution of the raw materials more uniform, laying a good foundation for the subsequent full mixing in the mixing drum, and effectively improving the mixing efficiency and mixing quality.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. Through the design of the mixing cylinder, feed pipe, stirring mechanism, and sealing top plate, this powder coating manufacturing mixer effectively solves the problems of leakage and dust pollution caused by traditional equipment. The feed hopper is equipped with an openable and closable top cover, which can be closed after feeding to initially prevent dust from overflowing. The sealing top plate above the mixing cylinder fits tightly with the cylinder body to form a fully enclosed cavity, ensuring zero leakage during the mixing process. Overall, the equipment achieves initial fusion of raw materials through the pretreatment mechanism inside the extrusion pipe, and the multi-directional paddle assembly of the stirring mechanism efficiently mixes the materials. Uniform mixing is completed in a closed environment, which avoids raw material waste and environmental pollution, protects the health of operators, and significantly improves the production quality and environmental benefits of powder coatings.

[0026] 2. By setting the annular sealing ring, the internal and external environments of the mixing cylinder are effectively isolated, ensuring that the mixing process is carried out in a completely sealed space. This avoids the leakage of powder coating raw materials into the surrounding environment due to poor sealing, which not only eliminates the waste of raw materials, but also greatly reduces the harm of dust pollution to the health of operators and ensures the stability of the mixing environment.

[0027] 3. By setting up the vibrator, a vibration force perpendicular to the pipe wall plane can be generated. Through periodic vibration, the adhesion of the raw material to the pipe wall can be effectively broken, so as to promote the smooth sliding of the raw material, prevent blockage, and ensure that the feeding process remains efficient and stable. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a mixer for manufacturing powder coatings according to an embodiment of this application.

[0029] Figure 2 This is a schematic diagram illustrating the connection between the feed tube and the extrusion tube in the embodiments of this application.

[0030] Figure 3 This is a cross-sectional view used to illustrate the stirring mechanism in the embodiments of this application.

[0031] Explanation of reference numerals in the attached drawings: 1. Mixing cylinder; 2. Feed hopper; 21. Top cover; 3. Feed pipe; 4. Extrusion pipe; 5. Pretreatment mechanism; 51. Extrusion screw; 52. Extrusion motor; 6. Stirring mechanism; 61. Stirring spindle; 62. Drive motor; 63. Stirring paddle assembly; 7. Sealing top plate; 8. Annular sealing ring; 9. Observation window; 10. Three-dimensional frame; 11. Triangular truss; 12. Mounting plate; 13. Vibrator; 14. Clamp connector. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0033] This application discloses a mixer for manufacturing powder coatings. (Refer to...) Figure 1 The powder coating manufacturing mixer includes a mixing cylinder 1. In this embodiment, the mixing cylinder 1 is cylindrical with a hollow interior. A feed hopper 2 is arranged above the mixing cylinder 1. The feed hopper 2 is used to receive various powder coating raw materials. The feed hopper 2 has a conical structure.

[0034] Reference Figure 1 The top of the feed hopper 2 is equipped with an openable and closable top cover 21, which is closed in time after the feeding operation is completed, so as to play a preliminary sealing role and prevent the raw materials from generating dust.

[0035] Reference Figure 1A feed pipe 3 is vertically installed below the feed hopper 2, and the feed pipe 3 is connected to the inside of the feed hopper 2. An extrusion pipe 4 is installed between the feed hopper 2 and the mixing cylinder 1. The extrusion pipe 4 is inclined towards the mixing cylinder 1, and its two ends are connected to the feed pipe 3 and the mixing cylinder 1, respectively. In this embodiment, the mixing cylinder 1 is equipped with a corresponding pipe opening for connecting with the extrusion pipe 4. The axis of the extrusion pipe 4 forms an angle of 10°-30° with the horizontal plane. The inclined extrusion pipe 4 uses the weight of the raw material itself and the slope of the pipe to guide the raw material more smoothly from the feed pipe 3 into the mixing cylinder 1, reducing the residue and accumulation of raw material in the pipe and reducing the risk of blockage.

[0036] Reference Figure 1 and Figure 2 A vibrator 13 is symmetrically installed on the outer wall of the feed pipe 3. The vibration direction of the vibrator 13 is perpendicular to the pipe wall plane. The vibrator 13 can generate a vibration force perpendicular to the pipe wall plane. Through periodic vibration, it can effectively break the adhesion state of the raw material on the pipe wall, promote the smooth sliding of the raw material, prevent blockage, and ensure that the feeding process is always efficient and stable.

[0037] Reference Figure 1 and Figure 2 Meanwhile, a clamp connector 14 is installed at the connection between the feed pipe 3 and the extrusion pipe 4; the clamp connector 14 can tightly clamp the feed pipe 3 and the extrusion pipe 4 to form a reliable sealed connection, effectively preventing the raw material from leaking at the connection and avoiding raw material waste and environmental pollution.

[0038] Reference Figure 1 and Figure 2 A three-dimensional frame 10 is welded and fixed to the outer wall of the feed hopper 2. The three-dimensional frame 10 is arranged on the ground to support the feed hopper 2. A triangular truss 11 is welded and fixed inside the three-dimensional frame 10. An installation plate 12 is installed on the feed pipe 3 and is fixedly connected to the triangular truss 11. The three-dimensional frame 10 provides basic support for the entire feeding structure. The triangular truss 11 enhances the stability and strength of the support structure and can effectively withstand the weight of the raw materials in the feed hopper 2 and feed pipe 3 and the vibration during equipment operation, ensuring the smoothness and stability of the feeding process.

[0039] Reference Figure 1 and Figure 3A pretreatment mechanism 5 is installed inside the extrusion tube 4. The pretreatment mechanism 5 includes an extrusion screw 51 and an extrusion motor 52. The extrusion screw 51 is rotatably arranged inside the extrusion tube 4 and is arranged along the length of the extrusion tube 4. The extrusion motor 52 is arranged outside the extrusion tube 4, and the output end of the extrusion motor 52 is connected to the end of the extrusion screw 51. In this embodiment, the extrusion tube 4 can be equipped with a corresponding heating component, which can adjust the temperature inside the extrusion tube 4 to a suitable range according to the characteristics of the raw materials, so that some raw materials, such as resin powder, can be appropriately softened and their viscosity reduced, which is beneficial for subsequent mixing with other raw materials. The pretreatment mechanism 5 pushes the raw materials to the mixing cylinder 1, shears and kneads the raw materials, promotes the initial contact, dispersion and mixing between different raw materials, breaks the agglomeration between raw material particles, and makes the particle size distribution of the raw materials more uniform, laying a good foundation for the subsequent full mixing in the mixing cylinder 1, and effectively improving the mixing efficiency and mixing quality.

[0040] Reference Figure 1 and Figure 3 The mixing cylinder 1 has a discharge port at the bottom, which is normally closed. A sealing top plate 7 is installed on the top of the mixing cylinder 1, and an annular sealing ring 8 is filled between the sealing top plate 7 and the mating surface of the top of the mixing cylinder 1. The sealing top plate 7 at the top of the mixing cylinder 1 plays a key sealing role, ensuring that a relatively independent and sealed space is formed inside the mixing cylinder 1. The annular sealing ring 8 effectively blocks the internal and external environments of the mixing cylinder 1, ensuring that the mixing process is carried out in a completely sealed space, avoiding the leakage of powder coating raw materials into the surrounding environment due to poor sealing. This not only eliminates the waste of raw materials, but also greatly reduces the harm of dust pollution to the health of operators, and ensures the stability of the mixing environment.

[0041] Reference Figure 1 and Figure 3 A stirring mechanism 6 is installed inside the mixing cylinder 1. The stirring mechanism 6 includes a stirring main shaft 61, a drive motor 62, and a stirring paddle assembly 63. The stirring main shaft 61 is rotatably connected inside the mixing cylinder 1. The drive motor 62 is arranged on the sealed top plate 7. The output end of the drive motor 62 is connected to the end of the stirring main shaft 61. At the same time, the stirring paddle assembly 63 is installed on the stirring main shaft 61 and is arranged along the axial direction of the stirring main shaft 61.

[0042] Reference Figure 2 An observation window 9 is installed on the sealed top plate 7. In this embodiment, the observation window frame is transparent and closed, so the operator can directly observe the mixing state of the raw materials in the mixing drum 1 without opening the cover, such as whether the raw materials are fully dispersed or whether there are any abnormalities such as agglomeration, so as to adjust the stirring parameters or take other measures in time to ensure that the mixing process is efficient and meets the quality standards.

[0043] The implementation principle of a powder coating manufacturing mixer according to an embodiment of this application is as follows: When the powder coating undergoes a mixing process, various powder coating raw materials, such as resin powder, pigment powder, filler powder, and various additives, are prepared according to a pre-set formula ratio. Then, the openable and closable top cover 21 of the top of the feed hopper 2 is opened, and the prepared raw materials are poured into the feed hopper 2 sequentially. After the feeding operation is completed, the cover is closed promptly to provide a preliminary sealing effect and prevent dust generation. After entering the feed hopper 2, the raw materials flow downwards along the vertical feed pipe 3 at the bottom of the feed hopper 2 and into the extrusion pipe 4. The pretreatment mechanism 5 installed inside the extrusion pipe 4 then begins to function, promoting… The initial contact and mixing of different raw materials: After pretreatment, the raw materials enter the mixing cylinder 1 through the extrusion tube 4. The drive motor 62 starts working, driving the stirring main shaft 61 to rotate. The stirring paddle assembly 63 on it moves accordingly, so that the raw materials in the mixing cylinder 1 can be fully stirred and mixed in all directions. During the mixing process, the sealing top plate 7 at the top of the mixing cylinder 1 plays a key sealing role, ensuring that a relatively independent and sealed space is formed inside the mixing cylinder 1. After a period of full mixing, the powder coating raw materials meet the requirements of uniform mixing. At this time, the discharge port set at the bottom of the mixing cylinder 1 is opened to discharge smoothly and enter the subsequent production process.

[0044] With its optimized structural design, this powder coating manufacturing mixer, featuring a mixing cylinder 1, a feed pipe 3, a stirring mechanism 6, and a sealing top plate 7, effectively solves the problems of leakage and dust pollution associated with traditional equipment. The feed hopper 2 is equipped with an openable and closable top cover 21, which can be closed after feeding to initially prevent dust overflow. The sealing top plate 7 above the mixing cylinder 1 forms a fully enclosed cavity, ensuring zero leakage during the mixing process. Overall, the equipment achieves initial fusion of raw materials through the pretreatment mechanism 5 inside the extrusion pipe 4, and efficiently mixes them with the multi-directional paddle assembly of the stirring mechanism 6. This allows for uniform mixing in a closed environment, avoiding raw material waste and environmental pollution, protecting the health of operators, and significantly improving the production quality and environmental benefits of powder coatings.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A mixer for powder paint production, characterized by: The system includes a mixing cylinder, a feeding hopper at the top of the mixing cylinder, an openable and closable top cover at the top of the feeding hopper, a vertically arranged feeding pipe at the bottom of the feeding hopper, an inclined extrusion pipe connecting the feeding pipe and the mixing cylinder, a pretreatment mechanism inside the extrusion pipe, a stirring mechanism inside the mixing cylinder, a sealing top plate at the top of the mixing cylinder, and the stirring mechanism including a stirring main shaft, a drive motor, and a stirring paddle assembly. The stirring main shaft is rotatably connected inside the mixing cylinder, the drive motor is arranged on the sealing top plate, the output end of the drive motor is connected to the end of the stirring main shaft, the stirring paddle assembly is arranged axially along the stirring main shaft, and a discharge port at the bottom of the mixing cylinder.

2. The mixing machine for producing a powder paint according to claim 1, characterized in that: An annular sealing ring is provided between the sealing top plate and the top of the mixing cylinder, and the annular sealing ring fills the mating surface between the sealing top plate and the mixing cylinder.

3. The mixing machine for producing a powder paint according to claim 2, characterized in that: The sealed top plate is also provided with an observation window for observing the internal situation.

4. The mixing machine for producing a powder paint according to claim 1, characterized in that: The outer wall of the feed hopper is provided with a three-dimensional frame for support, and a triangular truss is provided inside the three-dimensional frame. The feed pipe is provided with a mounting plate for connecting with the triangular truss.

5. The mixing machine for producing a powder paint according to claim 4, wherein: Vibrators are symmetrically arranged on the outer wall of the feed pipe, and the vibration direction of the vibrators is perpendicular to the plane of the pipe wall.

6. The mixing machine for powder paint production according to claim 1, characterized in that: A clamp connector is provided between the feed pipe and the extrusion pipe, and the clamp connector is arranged at the connection between the feed pipe and the extrusion pipe.

7. The mixing machine for producing a powder paint according to claim 6, characterized in that: The axis of the extrusion tube forms an angle of 10°-30° with the horizontal plane, and the feeding direction of the extrusion tube is inclined towards the mixing cylinder.

8. The mixing machine for producing a powder paint according to claim 1, characterized in that: The pretreatment mechanism includes an extrusion screw and an extrusion motor. The extrusion screw is rotatably arranged inside the extrusion tube and is arranged along the length of the extrusion tube. The extrusion motor is arranged outside the extrusion tube, and the output end of the extrusion motor is connected to the end of the extrusion screw.

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